<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <title>dlaed0.f</title>
 <meta name="generator" content="emacs 21.3.1; htmlfontify 0.20">
<style type="text/css"><!-- 
body { background: rgb(255, 255, 255);  color: rgb(0, 0, 0);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.default   { background: rgb(255, 255, 255);  color: rgb(0, 0, 0);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.default a { background: rgb(255, 255, 255);  color: rgb(0, 0, 0);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: underline; }
span.string   { color: rgb(188, 143, 143);  background: rgb(255, 255, 255);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.string a { color: rgb(188, 143, 143);  background: rgb(255, 255, 255);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: underline; }
span.comment   { color: rgb(178, 34, 34);  background: rgb(255, 255, 255);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.comment a { color: rgb(178, 34, 34);  background: rgb(255, 255, 255);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: underline; }
 --></style>

 </head>
  <body>

<pre>
      SUBROUTINE <a name="DLAED0.1"></a><a href="dlaed0.f.html#DLAED0.1">DLAED0</a>( ICOMPQ, QSIZ, N, D, E, Q, LDQ, QSTORE, LDQS,
     $                   WORK, IWORK, INFO )
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  -- LAPACK routine (version 3.1) --
</span><span class="comment">*</span><span class="comment">     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
</span><span class="comment">*</span><span class="comment">     November 2006
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     .. Scalar Arguments ..
</span>      INTEGER            ICOMPQ, INFO, LDQ, LDQS, N, QSIZ
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. Array Arguments ..
</span>      INTEGER            IWORK( * )
      DOUBLE PRECISION   D( * ), E( * ), Q( LDQ, * ), QSTORE( LDQS, * ),
     $                   WORK( * )
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  Purpose
</span><span class="comment">*</span><span class="comment">  =======
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  <a name="DLAED0.20"></a><a href="dlaed0.f.html#DLAED0.1">DLAED0</a> computes all eigenvalues and corresponding eigenvectors of a
</span><span class="comment">*</span><span class="comment">  symmetric tridiagonal matrix using the divide and conquer method.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  Arguments
</span><span class="comment">*</span><span class="comment">  =========
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  ICOMPQ  (input) INTEGER
</span><span class="comment">*</span><span class="comment">          = 0:  Compute eigenvalues only.
</span><span class="comment">*</span><span class="comment">          = 1:  Compute eigenvectors of original dense symmetric matrix
</span><span class="comment">*</span><span class="comment">                also.  On entry, Q contains the orthogonal matrix used
</span><span class="comment">*</span><span class="comment">                to reduce the original matrix to tridiagonal form.
</span><span class="comment">*</span><span class="comment">          = 2:  Compute eigenvalues and eigenvectors of tridiagonal
</span><span class="comment">*</span><span class="comment">                matrix.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  QSIZ   (input) INTEGER
</span><span class="comment">*</span><span class="comment">         The dimension of the orthogonal matrix used to reduce
</span><span class="comment">*</span><span class="comment">         the full matrix to tridiagonal form.  QSIZ &gt;= N if ICOMPQ = 1.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  N      (input) INTEGER
</span><span class="comment">*</span><span class="comment">         The dimension of the symmetric tridiagonal matrix.  N &gt;= 0.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  D      (input/output) DOUBLE PRECISION array, dimension (N)
</span><span class="comment">*</span><span class="comment">         On entry, the main diagonal of the tridiagonal matrix.
</span><span class="comment">*</span><span class="comment">         On exit, its eigenvalues.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  E      (input) DOUBLE PRECISION array, dimension (N-1)
</span><span class="comment">*</span><span class="comment">         The off-diagonal elements of the tridiagonal matrix.
</span><span class="comment">*</span><span class="comment">         On exit, E has been destroyed.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  Q      (input/output) DOUBLE PRECISION array, dimension (LDQ, N)
</span><span class="comment">*</span><span class="comment">         On entry, Q must contain an N-by-N orthogonal matrix.
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 0    Q is not referenced.
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 1    On entry, Q is a subset of the columns of the
</span><span class="comment">*</span><span class="comment">                          orthogonal matrix used to reduce the full
</span><span class="comment">*</span><span class="comment">                          matrix to tridiagonal form corresponding to
</span><span class="comment">*</span><span class="comment">                          the subset of the full matrix which is being
</span><span class="comment">*</span><span class="comment">                          decomposed at this time.
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 2    On entry, Q will be the identity matrix.
</span><span class="comment">*</span><span class="comment">                          On exit, Q contains the eigenvectors of the
</span><span class="comment">*</span><span class="comment">                          tridiagonal matrix.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  LDQ    (input) INTEGER
</span><span class="comment">*</span><span class="comment">         The leading dimension of the array Q.  If eigenvectors are
</span><span class="comment">*</span><span class="comment">         desired, then  LDQ &gt;= max(1,N).  In any case,  LDQ &gt;= 1.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  QSTORE (workspace) DOUBLE PRECISION array, dimension (LDQS, N)
</span><span class="comment">*</span><span class="comment">         Referenced only when ICOMPQ = 1.  Used to store parts of
</span><span class="comment">*</span><span class="comment">         the eigenvector matrix when the updating matrix multiplies
</span><span class="comment">*</span><span class="comment">         take place.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  LDQS   (input) INTEGER
</span><span class="comment">*</span><span class="comment">         The leading dimension of the array QSTORE.  If ICOMPQ = 1,
</span><span class="comment">*</span><span class="comment">         then  LDQS &gt;= max(1,N).  In any case,  LDQS &gt;= 1.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  WORK   (workspace) DOUBLE PRECISION array,
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 0 or 1, the dimension of WORK must be at least
</span><span class="comment">*</span><span class="comment">                     1 + 3*N + 2*N*lg N + 2*N**2
</span><span class="comment">*</span><span class="comment">                     ( lg( N ) = smallest integer k
</span><span class="comment">*</span><span class="comment">                                 such that 2^k &gt;= N )
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 2, the dimension of WORK must be at least
</span><span class="comment">*</span><span class="comment">                     4*N + N**2.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  IWORK  (workspace) INTEGER array,
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 0 or 1, the dimension of IWORK must be at least
</span><span class="comment">*</span><span class="comment">                        6 + 6*N + 5*N*lg N.
</span><span class="comment">*</span><span class="comment">                        ( lg( N ) = smallest integer k
</span><span class="comment">*</span><span class="comment">                                    such that 2^k &gt;= N )
</span><span class="comment">*</span><span class="comment">         If ICOMPQ = 2, the dimension of IWORK must be at least
</span><span class="comment">*</span><span class="comment">                        3 + 5*N.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  INFO   (output) INTEGER
</span><span class="comment">*</span><span class="comment">          = 0:  successful exit.
</span><span class="comment">*</span><span class="comment">          &lt; 0:  if INFO = -i, the i-th argument had an illegal value.
</span><span class="comment">*</span><span class="comment">          &gt; 0:  The algorithm failed to compute an eigenvalue while
</span><span class="comment">*</span><span class="comment">                working on the submatrix lying in rows and columns
</span><span class="comment">*</span><span class="comment">                INFO/(N+1) through mod(INFO,N+1).
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  Further Details
</span><span class="comment">*</span><span class="comment">  ===============
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  Based on contributions by
</span><span class="comment">*</span><span class="comment">     Jeff Rutter, Computer Science Division, University of California
</span><span class="comment">*</span><span class="comment">     at Berkeley, USA
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  =====================================================================
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     .. Parameters ..
</span>      DOUBLE PRECISION   ZERO, ONE, TWO
      PARAMETER          ( ZERO = 0.D0, ONE = 1.D0, TWO = 2.D0 )
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. Local Scalars ..
</span>      INTEGER            CURLVL, CURPRB, CURR, I, IGIVCL, IGIVNM,
     $                   IGIVPT, INDXQ, IPERM, IPRMPT, IQ, IQPTR, IWREM,
     $                   J, K, LGN, MATSIZ, MSD2, SMLSIZ, SMM1, SPM1,
     $                   SPM2, SUBMAT, SUBPBS, TLVLS
      DOUBLE PRECISION   TEMP
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. External Subroutines ..
</span>      EXTERNAL           DCOPY, DGEMM, <a name="DLACPY.118"></a><a href="dlacpy.f.html#DLACPY.1">DLACPY</a>, <a name="DLAED1.118"></a><a href="dlaed1.f.html#DLAED1.1">DLAED1</a>, <a name="DLAED7.118"></a><a href="dlaed7.f.html#DLAED7.1">DLAED7</a>, <a name="DSTEQR.118"></a><a href="dsteqr.f.html#DSTEQR.1">DSTEQR</a>,
     $                   <a name="XERBLA.119"></a><a href="xerbla.f.html#XERBLA.1">XERBLA</a>
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. External Functions ..
</span>      INTEGER            <a name="ILAENV.122"></a><a href="ilaenv.f.html#ILAENV.1">ILAENV</a>
      EXTERNAL           <a name="ILAENV.123"></a><a href="ilaenv.f.html#ILAENV.1">ILAENV</a>
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. Intrinsic Functions ..
</span>      INTRINSIC          ABS, DBLE, INT, LOG, MAX
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. Executable Statements ..
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Test the input parameters.
</span><span class="comment">*</span><span class="comment">
</span>      INFO = 0
<span class="comment">*</span><span class="comment">
</span>      IF( ICOMPQ.LT.0 .OR. ICOMPQ.GT.2 ) THEN
         INFO = -1
      ELSE IF( ( ICOMPQ.EQ.1 ) .AND. ( QSIZ.LT.MAX( 0, N ) ) ) THEN
         INFO = -2
      ELSE IF( N.LT.0 ) THEN
         INFO = -3
      ELSE IF( LDQ.LT.MAX( 1, N ) ) THEN
         INFO = -7
      ELSE IF( LDQS.LT.MAX( 1, N ) ) THEN
         INFO = -9
      END IF
      IF( INFO.NE.0 ) THEN
         CALL <a name="XERBLA.146"></a><a href="xerbla.f.html#XERBLA.1">XERBLA</a>( <span class="string">'<a name="DLAED0.146"></a><a href="dlaed0.f.html#DLAED0.1">DLAED0</a>'</span>, -INFO )
         RETURN
      END IF
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Quick return if possible
</span><span class="comment">*</span><span class="comment">
</span>      IF( N.EQ.0 )
     $   RETURN
<span class="comment">*</span><span class="comment">
</span>      SMLSIZ = <a name="ILAENV.155"></a><a href="ilaenv.f.html#ILAENV.1">ILAENV</a>( 9, <span class="string">'<a name="DLAED0.155"></a><a href="dlaed0.f.html#DLAED0.1">DLAED0</a>'</span>, <span class="string">' '</span>, 0, 0, 0, 0 )
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Determine the size and placement of the submatrices, and save in
</span><span class="comment">*</span><span class="comment">     the leading elements of IWORK.
</span><span class="comment">*</span><span class="comment">
</span>      IWORK( 1 ) = N
      SUBPBS = 1
      TLVLS = 0
   10 CONTINUE
      IF( IWORK( SUBPBS ).GT.SMLSIZ ) THEN
         DO 20 J = SUBPBS, 1, -1
            IWORK( 2*J ) = ( IWORK( J )+1 ) / 2
            IWORK( 2*J-1 ) = IWORK( J ) / 2
   20    CONTINUE
         TLVLS = TLVLS + 1
         SUBPBS = 2*SUBPBS
         GO TO 10
      END IF
      DO 30 J = 2, SUBPBS
         IWORK( J ) = IWORK( J ) + IWORK( J-1 )
   30 CONTINUE
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Divide the matrix into SUBPBS submatrices of size at most SMLSIZ+1
</span><span class="comment">*</span><span class="comment">     using rank-1 modifications (cuts).
</span><span class="comment">*</span><span class="comment">
</span>      SPM1 = SUBPBS - 1
      DO 40 I = 1, SPM1
         SUBMAT = IWORK( I ) + 1
         SMM1 = SUBMAT - 1
         D( SMM1 ) = D( SMM1 ) - ABS( E( SMM1 ) )
         D( SUBMAT ) = D( SUBMAT ) - ABS( E( SMM1 ) )
   40 CONTINUE
<span class="comment">*</span><span class="comment">
</span>      INDXQ = 4*N + 3
      IF( ICOMPQ.NE.2 ) THEN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">        Set up workspaces for eigenvalues only/accumulate new vectors
</span><span class="comment">*</span><span class="comment">        routine
</span><span class="comment">*</span><span class="comment">
</span>         TEMP = LOG( DBLE( N ) ) / LOG( TWO )
         LGN = INT( TEMP )
         IF( 2**LGN.LT.N )
     $      LGN = LGN + 1
         IF( 2**LGN.LT.N )
     $      LGN = LGN + 1
         IPRMPT = INDXQ + N + 1
         IPERM = IPRMPT + N*LGN
         IQPTR = IPERM + N*LGN
         IGIVPT = IQPTR + N + 2
         IGIVCL = IGIVPT + N*LGN
<span class="comment">*</span><span class="comment">
</span>         IGIVNM = 1
         IQ = IGIVNM + 2*N*LGN
         IWREM = IQ + N**2 + 1
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">        Initialize pointers
</span><span class="comment">*</span><span class="comment">
</span>         DO 50 I = 0, SUBPBS
            IWORK( IPRMPT+I ) = 1
            IWORK( IGIVPT+I ) = 1
   50    CONTINUE
         IWORK( IQPTR ) = 1
      END IF
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Solve each submatrix eigenproblem at the bottom of the divide and
</span><span class="comment">*</span><span class="comment">     conquer tree.
</span><span class="comment">*</span><span class="comment">
</span>      CURR = 0
      DO 70 I = 0, SPM1
         IF( I.EQ.0 ) THEN
            SUBMAT = 1
            MATSIZ = IWORK( 1 )
         ELSE
            SUBMAT = IWORK( I ) + 1
            MATSIZ = IWORK( I+1 ) - IWORK( I )
         END IF
         IF( ICOMPQ.EQ.2 ) THEN
            CALL <a name="DSTEQR.232"></a><a href="dsteqr.f.html#DSTEQR.1">DSTEQR</a>( <span class="string">'I'</span>, MATSIZ, D( SUBMAT ), E( SUBMAT ),
     $                   Q( SUBMAT, SUBMAT ), LDQ, WORK, INFO )
            IF( INFO.NE.0 )
     $         GO TO 130
         ELSE
            CALL <a name="DSTEQR.237"></a><a href="dsteqr.f.html#DSTEQR.1">DSTEQR</a>( <span class="string">'I'</span>, MATSIZ, D( SUBMAT ), E( SUBMAT ),
     $                   WORK( IQ-1+IWORK( IQPTR+CURR ) ), MATSIZ, WORK,
     $                   INFO )
            IF( INFO.NE.0 )
     $         GO TO 130
            IF( ICOMPQ.EQ.1 ) THEN
               CALL DGEMM( <span class="string">'N'</span>, <span class="string">'N'</span>, QSIZ, MATSIZ, MATSIZ, ONE,
     $                     Q( 1, SUBMAT ), LDQ, WORK( IQ-1+IWORK( IQPTR+
     $                     CURR ) ), MATSIZ, ZERO, QSTORE( 1, SUBMAT ),
     $                     LDQS )
            END IF
            IWORK( IQPTR+CURR+1 ) = IWORK( IQPTR+CURR ) + MATSIZ**2
            CURR = CURR + 1
         END IF
         K = 1
         DO 60 J = SUBMAT, IWORK( I+1 )
            IWORK( INDXQ+J ) = K
            K = K + 1
   60    CONTINUE
   70 CONTINUE
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Successively merge eigensystems of adjacent submatrices
</span><span class="comment">*</span><span class="comment">     into eigensystem for the corresponding larger matrix.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     while ( SUBPBS &gt; 1 )
</span><span class="comment">*</span><span class="comment">
</span>      CURLVL = 1
   80 CONTINUE
      IF( SUBPBS.GT.1 ) THEN
         SPM2 = SUBPBS - 2
         DO 90 I = 0, SPM2, 2
            IF( I.EQ.0 ) THEN
               SUBMAT = 1
               MATSIZ = IWORK( 2 )
               MSD2 = IWORK( 1 )
               CURPRB = 0
            ELSE
               SUBMAT = IWORK( I ) + 1
               MATSIZ = IWORK( I+2 ) - IWORK( I )
               MSD2 = MATSIZ / 2
               CURPRB = CURPRB + 1
            END IF
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Merge lower order eigensystems (of size MSD2 and MATSIZ - MSD2)
</span><span class="comment">*</span><span class="comment">     into an eigensystem of size MATSIZ.
</span><span class="comment">*</span><span class="comment">     <a name="DLAED1.282"></a><a href="dlaed1.f.html#DLAED1.1">DLAED1</a> is used only for the full eigensystem of a tridiagonal
</span><span class="comment">*</span><span class="comment">     matrix.
</span><span class="comment">*</span><span class="comment">     <a name="DLAED7.284"></a><a href="dlaed7.f.html#DLAED7.1">DLAED7</a> handles the cases in which eigenvalues only or eigenvalues
</span><span class="comment">*</span><span class="comment">     and eigenvectors of a full symmetric matrix (which was reduced to
</span><span class="comment">*</span><span class="comment">     tridiagonal form) are desired.
</span><span class="comment">*</span><span class="comment">
</span>            IF( ICOMPQ.EQ.2 ) THEN
               CALL <a name="DLAED1.289"></a><a href="dlaed1.f.html#DLAED1.1">DLAED1</a>( MATSIZ, D( SUBMAT ), Q( SUBMAT, SUBMAT ),
     $                      LDQ, IWORK( INDXQ+SUBMAT ),
     $                      E( SUBMAT+MSD2-1 ), MSD2, WORK,
     $                      IWORK( SUBPBS+1 ), INFO )
            ELSE
               CALL <a name="DLAED7.294"></a><a href="dlaed7.f.html#DLAED7.1">DLAED7</a>( ICOMPQ, MATSIZ, QSIZ, TLVLS, CURLVL, CURPRB,
     $                      D( SUBMAT ), QSTORE( 1, SUBMAT ), LDQS,
     $                      IWORK( INDXQ+SUBMAT ), E( SUBMAT+MSD2-1 ),
     $                      MSD2, WORK( IQ ), IWORK( IQPTR ),
     $                      IWORK( IPRMPT ), IWORK( IPERM ),
     $                      IWORK( IGIVPT ), IWORK( IGIVCL ),
     $                      WORK( IGIVNM ), WORK( IWREM ),
     $                      IWORK( SUBPBS+1 ), INFO )
            END IF
            IF( INFO.NE.0 )
     $         GO TO 130
            IWORK( I / 2+1 ) = IWORK( I+2 )
   90    CONTINUE
         SUBPBS = SUBPBS / 2
         CURLVL = CURLVL + 1
         GO TO 80
      END IF
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     end while
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     Re-merge the eigenvalues/vectors which were deflated at the final
</span><span class="comment">*</span><span class="comment">     merge step.
</span><span class="comment">*</span><span class="comment">
</span>      IF( ICOMPQ.EQ.1 ) THEN
         DO 100 I = 1, N
            J = IWORK( INDXQ+I )
            WORK( I ) = D( J )
            CALL DCOPY( QSIZ, QSTORE( 1, J ), 1, Q( 1, I ), 1 )
  100    CONTINUE
         CALL DCOPY( N, WORK, 1, D, 1 )
      ELSE IF( ICOMPQ.EQ.2 ) THEN
         DO 110 I = 1, N
            J = IWORK( INDXQ+I )
            WORK( I ) = D( J )
            CALL DCOPY( N, Q( 1, J ), 1, WORK( N*I+1 ), 1 )
  110    CONTINUE
         CALL DCOPY( N, WORK, 1, D, 1 )
         CALL <a name="DLACPY.331"></a><a href="dlacpy.f.html#DLACPY.1">DLACPY</a>( <span class="string">'A'</span>, N, N, WORK( N+1 ), N, Q, LDQ )
      ELSE
         DO 120 I = 1, N
            J = IWORK( INDXQ+I )
            WORK( I ) = D( J )
  120    CONTINUE
         CALL DCOPY( N, WORK, 1, D, 1 )
      END IF
      GO TO 140
<span class="comment">*</span><span class="comment">
</span>  130 CONTINUE
      INFO = SUBMAT*( N+1 ) + SUBMAT + MATSIZ - 1
<span class="comment">*</span><span class="comment">
</span>  140 CONTINUE
      RETURN
<span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     End of <a name="DLAED0.347"></a><a href="dlaed0.f.html#DLAED0.1">DLAED0</a>
</span><span class="comment">*</span><span class="comment">
</span>      END

</pre>

 </body>
</html>
